package com.practice.interceptor;

import com.practice.common.context.BaseContext;
import com.practice.common.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class JwtTokenUserInterceptor implements HandlerInterceptor {
    
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, 
                             Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        String token = request.getHeader("token");
        if (token != null) {
            Claims claimsBody = JwtUtil.getClaimsBody(token);
            int i = JwtUtil.verifyToken(claimsBody);
            if (i == -1 || i == 0){
                //ThreadLocal
                BaseContext.setCurrentId(Long.valueOf(claimsBody.get("id")+""));
                return true;
            }
        }
        response.setStatus(401);
        return false;
    }
}
